When the amino group reacts with the acidic group of an adjacent amino acid. Moelcule of H20 is displaced.
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What do 2 amino acids form
dipeptide
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What are multiple amino acids called
Polypeptide
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What is condensation polymerisation
When a molecule of water is displaced during the formation of a peptide link.
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How many different structures of protein are they
3. Primary, Secondary and teritary
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What is the primary structure of protein
Amino acids in a simple chain
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What is the secondary structure of protein
Amino acids are linked in bonds which is often a spiral shape.
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What is the tertiary structure of protein
It is a spiral that has been folded which is held together over cross links to form a golbular
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Briefly what happens to denaturation to the protein structure
Spirals are unfolded and bonds are broken when heated
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What are the two groups of protein
Globular- round shape and soluable e.g. haemoglobin. Fiberus proteins- straight or coiled shape and insoluble, elastic proteins gluten, collogen
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How many amino acids are there
20 amino acids
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What do we mean by essential/ indispensable amino acids
They can't be synthesized by body and therefore must come from diet.
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How many essential amino acids are there
9 for children and 8 for adults lysine, leucine, isoleusine, Methionine, phelnylalamine, thresonine, tryptopham, valine, (histidine)
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What do we call proteins that contain all 8 amino acids
Complete proteins or high biological value proteins (HBV)
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Where are HBV proteins found
Animal products and soya beans
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Proteins that lack 1 or more amino acids are called
Low biological value proteins (LBV)
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Where are LBV found
Plant foods e.g. pulses
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How can a vegetation ensure that they consume all essential amino acids
Complentation of proteins. By complining different types of plant proteins all the amino acids can be obtained, e.g. beans on toast. Lysine is low in toast but high in beans. Lentils and rice
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What is coagulation
when a structure of protein is permently changed e.g. egg whites and yolks change from a liquid to a solid.
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